Shoe supporting jack



Oct. 5,- 1943. A. R. MORRILL 2,331,130 i SHOE SUPPORTING JACK 2 Sheets-Sheet 1 Filed June 3, 1942 Oct. 5, 1943. A. R. MoRRlLL 2,331,130

SHOE SUPPORTING JACK Filed Jun 5, 1942 2 sheets-sheet 2 Patented Oct. 5, 1943 PM'NT IoirFior: ,7' `fl 2,331,130 4 ,y H l sHoE sUPPoRTrNGJAoK v Alfred -llfIor-rill, Beverly, Mass., yassigner to ,United uShoe,fltlachinery Corporation, Flemington, N. lJ.,n.corperation of NewJers'ey appiioitiioneiino e., 194e, serial No. 445,551

v .ao'iainie' `(oz. 12-"127i .c v

The 'present invention relates 5to, shoe s'u`ppofr`t-r ing jacks 'forV use in fthe maaCt-re of 'shoesnd more particularly to an improvedf'means'for actuating the tiltinglast pin Aeonnnc'a'nly'used in Ashoe supporting jacks toela'rnp ashoe :in positionen the jack. y f

The invention is herein 'disclosed asernbodi'ed in Aa 4"shoe lsupporting jack of the type disclosed in applicant'fs pending )application Serialy No. 367,587, filed November '23, 1940,"comprisingla toe rest, a 'heel support vmovable towardlsv'and "frorn'tl'ie vtoe rest, a flast pin carrier' pivdtally 'mounted in the`heel support, 'and a jacking'lever and connections actuated thereby, for tilting kthe last pinearrier to press it'het'o'e fof the )shoe yagainst the toe rest; i 'n Y; f p

The present invention consists in an improved means Icomprising a longitudinally movable wedge c or tilting "the lastpin'earriercommonlyused in shoe supporting jacks and for locking the carrier against backward movement, an'd it fisr tobefunders'too'd that,y `except as jefin'ed in the claims, the invention is not limited 'to use in the .particular type of shoe supporting jack disclosed in applicants prior Aapplication but may be ern- `ployed vtor advantage in any form lof jrack'havng a tilting last pin for clamping a shoea'gainst the 'toe rest of 'thefjaclh Referring to the draw-ings( inwhich is"i1flus trated a shoe 'supportingfjack 'provided with a last pin tilting and 4locking mechanism embodying one 'form of the variou'sf'featiiresof the -present invention, Fig. 1 is aview in elevation, andpartly in section, ofthe sh'oe supporting portion lof 'the iaok, with the-parts# 'in positions readyifor the reception 'of a lasted shoe; 2`"s a similar view bt illustrating the lasted shoe` in clamped position on lthe jack; Fig. 3 is fa 4detailed sectional fthe toe resti.v 'Duri-ng this movement of th'ejlifeel supper-t, the t'oe rest 'is adjusted vertically tothe folesiied height by means ofa 'rod I2, thepfoiwaid end of which i's arranged 'to slide between s'it- 'ahly shaped surfaces n'the jack frame and under i 'side'o'f the toe rest 2 endine rear endof which is pivote/ily connected to the heel -support l.

At the E'toe frest end 'of the jack frame is va pair of 'toe grips or clamps M between Which'th'ejtoe 'of'fa shoe is located and held in proper position laterally fdf the jackframe. Mechanism sprovided for no'oving the toe grips towards and 'from eachother, which mechanism includes'lplun'g'ers I6, a pinion shaft lextending horizontally tretween ve'ac'h 'plunger 'I5 and meshing with arack 20 mofnted lfor lengthwise sliding movement in the jack nfrance y'8. Vlr/hen the rack slides in the frame' the pinion 'shaft is rotated; and the plungers |56 are moved against the lowerendsof levers supporting the toe gr'ips'to 'cause 'thatce 4grips to 'be brought together 'into Contact with the toe end 'of a shoe on the `j'a'clfz. Movement v'is 'iinparted to the rack througha locking pawl' '2-2 View on an enlarged 'scale illustrating thevconi struct-ion of 'the parts shown "in Fig. '2; and Fig; 4 is a detail -cross-sectionalview taken on `a plane indicated by the lined- 4 of Fig. 3. Except as hereinafter described, the jack illustraten in the drawings comprises parts constin'cte'dv and arranged to operate as 'fully illustrated deso'lbed in ppleant'pending applieation above referred' to. As illustrated, the jackoompr'ises a toe rest indicated at '-2 and a neel support indicated at u. The toe rest 2 is pivot-ally mounted a't "6 on the 'a'ckframeg so as to be capable 'ol a vertical 'adjustment for Vshoes of different sizes. 'Th'eheelfsupport lVis in the form of a slide and is mounted inv guideways 1 v(see Fig. 4) in the Jack 'frame so'as vto be movable towards and vfrom the toe rest. To locate 'the shoe lengthwise in 'the jack, a toe gage indicated `at 19 is fixed in the jack frame in position to 'engage the tce end of the shoe and A stop 'the shoe in the desired position as the heel I support With the rshoe thereon is -moved towards cooperating withv ratchet teeth '2`3 on thefrack.

The pat/1 "is modntedupon thejeccentric hub 'of al'i'aird operated jacking lever 24 pivotally mouhted upon 'a pivotpinfi"v in the forward end of vthe heel supportslfidefa spring' being provided to hold the pawl in A'engagenient with teeth 23 fon the under surface `voi thefrack. lAt the outer end of the heel suppotnsl'idefis'-a last pin carrier 3ft pivotally mounted ponfa horizontal pin 32 and provided, with on upwardly projeoting' iastpin 'Fhefloigszerportion Yof the lastrpijn carri'er 73B is 'slottedto rece/ive anuactuating arm 36 which is pivotally supported at its upper end upon the pinfkz.

'the toe rest,v the `last pin carrierk32 istil'ted to ATorce the last pin towardsthe toev rest and to enable the jacking, lever .to tiltthe last pin carrier, the lever is 'connected by a link` 38 which, together with the jacking lever, forms a toggle. When thetcfggleis straightened, the last pin and carrier'arey tilted to .clamp the. shoe. 4Asjthus far described, theconstruction and operationof the illustrated jack are the same as that o'fthe inoludingtne link 38, a substantial variation `may v To press the toe of ashoe onthe jackfagainst carrier are tilted towards the toe rest and as a result, in some instances, the lasted shoe may be insecurely clamped in place on the jack. If small ratchet teeth with narrower spacings are employed on the last pin carrier, there is danger of breakage or injury to the teeth as a result of the heavy pressures required in clamping the shoe. In order to oiset the possibility of'looseness of the shoe after being clamped on the jack in the application, a holding pawl separate from the actuating pawl is provided so that if the first movements of the jacking lever and connected toggle are insufficient to clamp the shoe securely, the actuating lever can again be operated a short distance to bring the actuating pawl against a new ratchet tooth on the last pin carrier, the holding pawl preventing the last pin carrier from releasing the shoe ,during this operation. If the jacking lever of the application is then moved to straighten the toggle including the link 38, the actuating pawl tends to tilt the last pin carrier with greater force and a further distance-corresponding to the length of the new ratchet tooth. Even by operating the jacking lever more than once, as indicated, there is no positive assurance in the prior jack that the shoe will be held securely under all conditions, particularly if the shoe is insecurely located on the jack before clamping.

To obviate these difficulties in the construction of the present illustrated jack, the ratchet teeth 40 on the last pin carrier 30 are engaged by a single pawl 42 only pivotally mounted on the actuating arm 36 so as to enable engagement and disengagement from the ratchet teeth. To actuate the pawl towards and from the ratchet teeth and to move the pawl in a direction to tilt the last pin and carrier, the pawl 42 is provided with projections 44 and 46 acting against a lengthwise movable wedge 48 and a wedge supporting surface 50 on the heel support slide, respectively. The wedge 48 is mounted within a slot of the heel support slide and moves along the surface 59 towards and from the last pin carrier pivot pin 32. When raised towards the pivot pin 32, the wedge engages the projection 44, first swinging the pawl 42 about its pivot into engagement with the ratchet teeth and then moving the pawl bodily to tilt the last pin and carrier, thus clamping the toe of a shoe on the jack firmly against the toe rest. 'I'he lower end of the wedge is slotted longitudinally of the wedge to receive one arm of a lever 52 having a transverse pin 54 fitting within notches at the sides of the slot in the wedge. The lever 52 is fulcrumed on a pin 56 in the heel support slide and has in its other arm a pin 58, the ends of which enter slots in a forked end of the link 38.

To impart a yielding shoe clamping movement to the wedge 48, a compression spring 60 (Fig. 3) is mounted within a recess in the link 38 and acts on a plunger 62 at the outer end of the recess, which plunger engages the surface of the lever 52, the arrangement being such that when the actuating lever is operated to clamp a shoe on the jack, the wedge 48 will be raised yieldingly along the supporting surface 50 without causing the pin 58 to engage the ends of the slots in the link 38, even under the most extreme conditions. The strength of the spring 6U is suillcient to raise the wedge 48 with a shoe clamping force and to hold the wedge from reverse movement. The angle of the wedging surface on the wedge, together with the force of the spring 60, for all practical purposes, act as an irreversible lock in positively preventing the shoe from being loosened or unclamped. The spring itself through the wedge also will take up automatically any looseness in the shoe clamping mechanism which results from insecure location of the shoe on the jack before clamping.

When the shoe is to be unclamped, the jacking lever is moved from the position of Figs. 2 and 3 into the position of Fig. 1 to break the toggle comprising link 38 and the jacking lever and to cause the wedge 48 to be lowered along the supporting surface 5D. The first downward movement of the wedge causes the clamping pressure of the last pin on the shoe to be relieved. Thereafter, further downward movement of the wedge causes the projection 46 on the pawl 42 to be moved, by means to be described, towards the wedge supporting surface 50 and the pawl to be disengaged from the ratchet teeth 46. To insure positive `disengagement of the pawl from the ratchet tooth, a lug on the arm 36 is acted upon by a plunger 64 backed by a relatively strong spring 66 coiled within a recess in the heel support slide. The force of the spring 66 tends to swing the pawl carrying arm 36 towards the wedge support surface 50, thereby positively pressing the pawl away from the ratchet teeth 40. As soon as the pawl is disengaged from the ratchet teeth, the last pin 34 and carrier 30 are tilted outwardly away from the toe rest by a leaf spring 68 mounted within the slot of the last pin carrier and having its lower end made fast to the pawlarm 36. The outward tilted position of the last pin carrier is limited by the engagement of the lower end of the carrier against the wedge supporting surface 50, as indicated in Fig. 1. When in this position, the last pin is ready for the reception of a new shoe. i

After applying a new shoe to the last pin and during movement of the toe of the shoe by the operator downwardly against the toe rest,the last pin' is tilted slightly into a preliminary position. Thereafter, movement of the jacking lever into shoe clamping position (Figs. 2 and 3,) causes a uniform irreversible clamping movement to be imparted to the last pin carrier, the last pin tilting forcibly towards the toe rest and bringing the shoe into securely clampedI position. If the shoe is insecurely located on the jack during the preliminary and final clamping movements imparted to the last pin, after the spring 68 takes up the resulting looseness in the shoe, the wedge will prevent release even if heavy pressures are applied to the shoe during further operations. In this way, the spacings between the ratchet teeth may be made sufficiently wide to insure suitable strengthl without affecting the uniformity of forces with which the shoe is clamped and held from displacement on the jack. Also, no special attention is required on the part of the operator, after clamping the shoe, to insure that no looseness exists between the shoe and the jack before initiating further operations on the shoe.

The nature and scope of the present invention having been indicated, and constructions embodying the several features of the invention having been specifically described, what is claimed is: y

l. A shoe supporting jack for use in the manufacture of shoes comprising a frame, a toe rest mounted on the frame, a heel support, a last pin, a last pin carrier mounted to tilt on the heel support and press the toe of a lasted shoe placed on the jack against the toe rest, devices comprising a ratchet and cooperating pawl for holding the last unclamp the shoe strong spring.

pin carrier in tilted position, a jacking lever, anf

endwise mo-vabiewedge'actingonsaid devices arranged When'moved in onedirection to tilt the last" pin carrier to clampthe Vshoe on the jack, yielding connections from the jacking lever to the opposite endwise direction.

2. A shoe supporting jack Afor use in the manu- 'facture of shoes comprising a yjframe, a toe rest:r l

mounted onfthe frame, a heel support, a last pin, a lastpin carrier mounted to tilt on the heel support andv press the toe of a lastedshoe placed on the'jack against the toe rest, an endwise movable wedge, means actuatedb'y an endwis'emovev support and press the toe o f a lasted shoe placedpin, a last pin carrier mounted totilt ontheheel on the jack against the toe rest, an endwise Inov-V ablewedgea ratchet on the last pin carrier, an*k arm pivotally mountedon,the heel supportgand a vpawl mounted on the armrand arranged toen- :gage the ratchetand to be actuated by anyend-v mentof the Wedge in one direction for tilting the j A.

last pincarrier and forholding'the carrier intilted position, yielding means for moving the Wedge yin said direction, andmeans for supporting the wedge arranged to', lock the wedgeA from' e movement in the opposite direction against backthe Jack againstthe toerest, an endwisej-movable vwedge, a ratchet on the last pin carrier,{an f ,Ward pressure exerted from the last pin carrier on `the Wedge. ,v

3. A shoe supporting jack for vuse inrthe'manufacture of'shoes comprising a frame, a` toe rest mounted on the frame, a heel support,alastpin, a last'pin carrier mounted to tilt on ,the heel support and press the toe of a' lasted shoeplaced f on the jack against the toe rest, a ratchetfon the last pin carrier, an armpivotally 'mounted on'the heel support, a paw] mounted on the arm and t arranged to engagethe ratchet, a 'jacking lever,l connections including a yielding member for im`- parting to the arm a movement ina directiony to tilt the last pin carrier towardsthe'to'e rest and for imparting a movementto the arm inf the opposite direction to tiltthelast` pin carrier away from the toe rest, andA means acting duringthe j movement of the arm in said'opposite direction f to disengage the p awl from the fr atchet.,

4. lA shoesupporting jack for` use in the manu;`

vfactureof shoes comprising a frame,f a toe rest y f mounted on the frame, a heel support, a iastv pin, 3 fa. last pncarrier mounted to tiltA on the heel supportand press the toe of alasted shoe placedon the jack'against the toexi'est, a ratchet onthey last pincarrier, `anarxn pivotally mounted onv the heel support, `arpa-Wl mounted on" the 'arm and'arranged to engage the ratchet, aljacking lever, connections fromythe jacking ilever lforimfparting to the arm a movement inladirection to tilt the last pin. carriertowardsl the toe rest,

a comparatively strong spring lacting `on the arm arm pivotally mounted kon the heel vsupport, a pawlmountedon the arm and arranged to en gage Vthe ratchet yand to be actuated byian endf vse movement ofthe wedgeinone direction for if moving'the vpawl. rinto]engagement with the Y ratchet and then by arcontinued movement inf' the same direction for-moving'the paWl 'armrto i i .tilt the last piny carriervtowards ,the'toe rest, "a "l vsupporting lsurface on the,` heel supportfalong` `which'thevvedge moves, and a projection onthef y pawl arranged 5to engage the Wed'gesuppo'rting' wise movementof the Wedge in one direction `for moving' the pawl 1 into engagement withr k'the ratchetand then 'by a continued movement in;

the -sa'me .direction for moving thejpawl arm tilt the last pin carrier towards the toe rest.`

Y 7. A shoe supporting jack for usein the manufacture ofshoes comprisinga, frame, ajtoe rest mounted Onthe frame, alheel, support, a last pin,v a last pincarrie'rmounted totilt on the heel sup-r yp ort'and press the'toe of alasted shoefplaced on" arm pivotally mounted on the heel support, La

tilt .the lastpin carrier towards the toe rest, yand means Afor disengaging the pawl from the ratchet, fi 'i ."during return movement ofv the pawlarm.v Y

V8. 'A s hoe supporting jack for use in the manufactureof shoes comprising a frame, artoev rest l mounted vonthe frame, a heel support, alast pimvr a last pin carrier mounted'to tilt on the heelsupport andpress the yto'e of a lasted shoe-placed on thefjackagainst the toe rest, an endwise mov".` able' wedgea ratchet on the last pin carrier, an

surfaceof the heel support to disenga'ge the pawl forimoving the ,arm,in,a directicm'v to cause thejA pawlto slidefidly along the ratchetandto uri-f clamp the shoe, andy acomparatively weak springvr acting on. the last pinz carrier Ain a direction to;

when the arm `is moved by the 5. A shoe supporting jack `vforusel in themanu-l V y facture` of shoes comprising a frame,. as toe rest j mounted on the frame,- `a heel support, alastpin, f a last pin carrier mounted Vto tilt'on the'heel sup. A

0 j l V l 6 on the jack against the toe rest,ndevices forlockfromthe ratchet during return'movementof the lDawl arm. -n Y i 9.;A shoe suppltingjack'for use in the manu; factureofshoes comprising a frame, a toe rest mounted on theframe, aheel support, alast'pin, f aqlast' pincarrier mounte'dto'tilt on the'he'el.

support and press thetoe of a lasted shoerplacled ing the carrier intilted position 'comprising a port and press the'toefofa lastedshoe placed on f y, the jack against the toerest, devices'for locking fthe carrier in tilted position comprisinga longifk tudinally `movable ,Wedge, and devices intermedi` ate the carrier and wedge' engaged by the wedge and arranged to be actuated by the wedge`when moved'i'n one direction 'to tilt;` the carr'ienjyieldv` V'flongit'udinally*movable Wedge, and dev icesfinter-- f mediate :the carrier and Wedge engagedby'ithe'fl -Wedge andarrangedto be actuated bythe Wedge 1 jwjhe'n 'moved in one direction to tilt theca x"ri'er,.,y means f'for supporting the wedge againstk pres; sureexerted, on Vthe wedge'from the lastpin' car-"f rier bysaidv intermediate devices, a jackinglever ,andi atoggle actuated by thefjacking lever,V andy' *7: alever having one arm connected to thetoggle and another to the wedge Afor moving the Wedge y n Y inra' direction to'vtilt the'last in to ard y n' ing means for moving the'wedge insaid direction, p W 's the? we f f and means for supportingthe wedge again`stpres-'-' rest.

- ALFRED n. Monnnn n 

